An illustration of the Teamster logo sits in the center of the button, an image of two horses facing opposite directions connected to/or above a wheel. The illustration sits on a grey and white background with black text. On the edge of the button is black text on a red background that circles the illustration.
The word "LABEL" on top of an oval.
The International Brotherhood of Teamsters (IBT) is a labor union in the United States and Canada. Formed in 1903 by the merger of several local and regional locals of teamsters, it was originally known as the International Brotherhood of Teamsters, Chauffeurs, Warehousemen and Helpers of America. Jimmy Hoffa, General President of the union, was instrumental in using the assets of the Teamsters' pension plans, particularly the Central States plan, to support Mafia projects, such as the development of Las Vegas in the 1950s and 1960s.
A close associate of Hoffa during this period was Allen Dorfman, who owned an insurance agency that provided insurance claims processing to the Teamsters' union, and which was the subject of an investigation by the McClellan Committee. Dorfman also had increasing influence over loans made by the Teamsters' pension fund, and after Hoffa went to prison in 1967, Dorfman had primary control over the fund. Dorfman was murdered in January 1983, shortly after his conviction, along with Teamsters' president Roy Lee Williams, in a bribery case.